Reversible reduction gear



Dec. 7, 1937. E, w, BRASFIELD 2,101,774

REVERSIBLE REDUCTION GEAR 'Filed Aug. 15, 1936 A BY mywf@ ATTORNEYS y Patented Dec. 7, 1937 UNITED STATES PAENT OFFICE Evan W. Brasiield, SheielnLAla. Application August 15, i936, serial No.. 96,259,

3 Claims.

This invention relates to a combined reverse and reduction transmission adaptable fory various devices such as boats, elevators, hoists, etc., and has for the primary object the provision of a E device of this character which will provide a positive drive in either direction between drive and driven shafts with said shafts arranged in endwise alignment for eliminating bands and such parts heretofore employed in such devices of rotation between said shafts may be as desired by lsimply selecting and adapting to the device gears of proper sizes. l

Another object of the invention is the provision of a brake means for the driven shaft automatically operated by the actuation of the clutch employed for connecting said device to a prime mover whereby upon the disengagement of the clutch the driven shaft will be automatically stopped so that the shifting gears of this device may be readily moved into and out of mesh with other gears for the reversing of operation of the driven shaft by the drive shaft.

With these and other objects in view, this invention consists in certain novel features of construction, combination and arrangement of parts to be hereinafter more fullydescribed and claimed.`

For a complete understanding of my invention, reference is to be had to the following description and accompanying drawing, in which Figure 1 is a sectional view taken on the line l-l of Figure 2 illustrating a combined reversing and reduction transmission constructed in accordance with my invention.

Figure 2 is a sectional view taken on the line 9 2 of Figure 1.

Figure 3 is a detail sectional-view taken on the line t-- of Figure `1.

Referring in detail to the drawing, the numeral l indicates a suitable housing which may be bolted or otherwise secured to a clutch housing 2 forming a part of a prime mover (not shown). Operating in the clutch housing is a clutch 3 of a conventional construction and which is connected to the prime mover and is provided with a control il 'whereby the clutch may be engaged and disengaged when desired. Connected to the clutch and extending into the housing l is a drive shaft 5. Also extending into the housing l is a driven shaft 6 arranged in endwise alignment `with the drive shaft 5. Also lou cated in the housing l are countershafts 'l and d. The shafts 5, 6, l, and 8 are rotatably supported in the housing l by anti-friction `bearings and provides a device wherein the ratio of speed (lCl. 'Z4-358) 9. 'I'he countershaft d is connected to the drive shaft 5 by gears i0 and ll.` The gear l0 is secured to the countershaft 8 and meshes With the gear ll and the latter is secured to the drive shaft 5. The countershafts l and 8 are connected by gears i2 and i3. The gear I3 is secured to the countershaft 'l and meshes with the gear l2 and the latter is secured to the countershaft 8. Due to the arrangement of the gears I2 and I3 thecountershafts l and will be driven in opposite directions by the drive shaft 5.

A gear it is secured to the driven shaft 6 and splined to the countershafts 'l and 8 are pinions l5 and it. A control ll'is connected to the pinions I5 and l5 and is of such a construction that the movement thereofwill slide the pinions in opposite directions. Through the control l1 the pinion it may be made to mesh with the gear it for the purpose of rotating the driven shaft 5 in the same direction as the rotation ofthe drive shaft 5. To drive the driven shaft 6 in a reverse rotation to the drive shaft 5,. the pinion l5 is caused to mesh with the gear It. Thus it will be seen. that it is possible to drive the driven shaft t in either direction by the drive shaft 5 rotating in one direction. Also it is to be noted `that through, lthe arrangement of the gears the speed of rotation of the driven shaft relative to the drive shaft may be varied by changing the size of the gears.

Operating in conjunction with the driven shaft is a brake It of any conventional construction and supported by the housing l and is operatively connected to the control t of the clutch so that when the clutch is disengaged by the actuation ofthe control t the brake will retard and stop y the driven shaft 6 so that the pinions may be readily engaged and disengaged with the gear It.

Suitable thrust bearings i9 are mounted in the housing l and are adapted to the driven shaft 6 for the purpose of taking endwise thrust in both directions on said shaft 6. The housing l is equipped with a water jacket for the purpose of maintining the lubricant therein and gears `and bearings at a desired operating temperature. The housing also is provided with a removable cover 2li and a breather pipe 2l.

The clutch operating shaft d is' connected to 'the brake ld by a bellcrank 22 having a link- 23 secured thereto which is secured at its opposite end to a crank 2t carried by a brake shaft 25.

Having described the invention, I claim:

1. A combined reversing and reduction transmission including `a 'housing and a clutch of a power source, a. drive shaft supported by the housing and connected to the `clutch, a driven shaft supported by the housing and. arranged y in endwise alignment with the drive shaft, counter shaft may be rotated in either direction by the rotation of the drive shaft in one direction.

I2. A combined reversing and reduction transmission, including a housing and a clutch of, a power source, a drive shaft supported by the housing and connected to the clutch, a driven shaft 'supported by the housing and arranged in end- Wise alignment with the drive shaft,vcountershafts journaled in the housing on opposite sides of said driven shaft, means connecting one of the countershafts to the drive shaft, a gear xed to said driven shaft, gear means connecting the countershafts, pinions slidably secured to the countershafts, lever means connecting said pinions together for movement in opposite directions, and

means connected to said lever means for manually rocking said lever means whereby the driven shaft may be rotated in either direction by the rotation of the drive shaft in one direction.

3. A combined reversing and reduction transmission, including a housing, a drive shaft supported by the housing, a driven shaft supported by the housing and arranged in endwise alignment with the drive shaft, countershafts jourf naled in' the housing on opposite sides of said driven shaft, means connecting one of the countershafts to the drive shaft, a gear fixed to said driven shaft, gear means connecting the countershafts, pinions slidably secured to the countershafts and selectively engageable with said gear on said driven shaft, a lever extending between said pinions, means carried by the opposite ends of said lever engageable Withsaid pinions to move said pinions longitudinally of said countershafts for selective engagement with said gear on said driven shaft, a rock shaft carried by said housing engaging said lever intermediate the ends thereof, and operating means secured to said rock shaft.

EVAN W. BRASFIELD. 

